1400657, OPR, HYSTER, Hyster2, SRM

//-->.pos {position:absolute; z-index: 0; left: 0px; top: 0px;}PLANETARY DRIVE AXLEGENERALThis section has a description, repair procedures, andtroubleshooting guide for the planetary drive axle. Theservice brakes are part of the components in the plane-tary hubs and are included in the procedures for disas-sembly and assembly of the drive axle. The disc parkingbrake is fastened to the differential.transfer the torque from the differential to the planetarygears.The ends of the outer axle shafts have splines that en-gage the planetary sun gears. See FIGURE 2. A sun gearturns when the axle shaft turns. The planetary ring gearis engaged with the splines on the spindle and does notturn. The planet carrier (planetary drive flange) hasthree pinion gears that engage the sun gear and the inter-nal ring gear. The planet carrier is installed on the hubwith capscrews. When the sun gear rotates, the piniongears move around the ring gear, and turn the planet car-rier, hub, and when as they move.61DESCRIPTION, PLANETARY DRIVE AXLEThe drive shaft from the transmission is connected to thedifferential in the drive axle housing. The axle shafts625433471.2.3.4.5.887HOUSING, DRIVE AXLEDIFFERENTIALHOUSING, SERVICE BRAKESHUB, PLANETARY GEARPARKING BRAKE6. INLET PORT, SERVICE BRAKE ACTUATION7. INLET PORT, BRAKE COOLING CIRCUIT8. OUTLET PORT, BRAKE COOLING CIRCUITFIGURE 1. PLANETARY DRIVE AXLE11231. STATIONARY RING GEAR (ON SPLINES OF SPINDLE)2. PLANETARY GEAR (ROTATES ON SHAFT IN DRIVEFLANGE3. PLANET CARRIER (PART OF DRIVE FLANGE ANDFASTENED TO THE HUB)4. SUN GEAR (ENGAGED WITH THE SPLINES ON THEOUTER AXLE SHAFT)122224FIGURE 2. PLANETARY GEAR OPERATIONTABLE 1.APPROXIMATE WEIGHTS OF AXLEPARTSCOMPONENTWIDE AXLE ASSEMBLYSTANDARD AXLEASSEMBLY14.00 x 24 SOLID RUBBERTIRE AND WHEELASSEMBLY12.00 x 24 SOLID RUBBERTIRE AND WHEELASSEMBLY14.00 x 24 PNEUMATICTIRE AND WHEELASSEMBLY12.00 x 24 PNEUMATICTIRE AND WHEELASSEMBLYWEIGHTkg13851135545lb305025001200the following steps without removing the mast. Thenuse the crane to raise the lift truck so that there is clear-ance to remove the drive axle.WARNINGMake sure that the lifting device has the capacity tolift the axle assembly and components. SeeTABLE 1. for the approximate weights of axle com-ponents.1. Put blocks under the lift truck frame to raise the drivewheels from the ground. See “How To Put The LiftTruck on Blocks” in theOPERATING MANUALorthePERIODIC MAINTENANCE, 8000 SRM 662.2. Remove the mast assembly from the lift truck as de-scribed in the sectionTHE MAST, 4000 SRM 660orTHE MAST (WITH CONTAINER ATTACH-MENT, 4000 SRM 661).3. Put a drain pan under the differential housing anddrain the oil.405890315695200440DRIVE AXLE, REMOVALNOTE:The planetary assemblies and the service brakeassemblies can be disassembled with the drive axle in-stalled in the lift truck. The following procedure is forremoval of the complete drive axle. See PLANETARYGEAR in this section for disassembly and assembly pro-cedures for the planetary gear assembly and the servicebrakes.NOTE:If a 10–ton capacity crane is available, the driveaxle can be removed without removing the mast. Re-move the forks and carriage or the container handler. Do2WARNINGBefore disconnecting any hydraulic lines, releasepressure from the hydraulic circuit as follows:a. Shut–off the engine and completely lower thecarriage.b. Operate the lift/lower lever and the brake ped-als until the hydraulic pressure is released.4. The service brakes use hydraulic oil from the hydrau-lic system for actuation and cooling. Drain the hydraulicoil from each brake housing. Disconnect the oil coolantlines. Disconnect the oil lines that actuate the brakes.See FIGURE 1. Put caps on the open hydraulic lines.5. Disconnect the universal joint from the yoke at thedifferential. Disconnect hydraulic line to the parkingbrake.6. If the axle must be disassembled for repairs, rotate theplanetary gear so that the drain and fill port is at the low-est point. See FIGURE 3. Drain the lubricant from eachplanetary gear assembly.c. If a tire jack is not available, raise the axle onlyenough so the tires are just touching the floor.Slide the tires from the axle while they are still onthe floor. It is helpful to put a lubricant on thefloor (oil, grease, liquid soap, etc.).WARNINGMake sure to clean the floor thoroughly if oil, grease,liquid soap, etc. was used as a lubricant to help re-move the wheel and tires.8. Use a lifting device (floor jack or the forks of a lifttruck) to remove the drive axle. Put the lifting device un-der the axle to give it support. Remove the eight boltsand nuts that hold the axle to the frame. Remove thedrive axle from the lift truck frame.DRIVE AXLE, INSTALLATION1. Use a lifting device (floor jack or the forks of a lifttruck) to install the drive axle under the lift truck. Installthe eight bolts and nuts that hold the axle to the frame.1. DRAIN ANDFILL PORT1FIGURE 3. PLANETARY GEAR, DRAIN ANDFILL2. Add air to the tires in a safety cage. Install the tires onthe drive axle. Also seePERIODIC MAINTE-NANCE, 8000 SRM 662for additional information fortire installation. Tighten the wheel nuts to the correcttorque.3. Connect the oil lines and the oil coolant lines to thebrake housings.4. Connect the universal joint to the yoke at the differen-tial. Connect the oil line to the parking brake.5. Install the correct lubricant in the differential. SeePERIODIC MAINTENANCE, 8000 SRM 6626. If the mast was removed, install the mast. See the sec-tionTHE MAST, 4000 SRM 660orTHE MAST(WITH CONTAINER ATTACHMENT), 4000 SRM661.7. Install the carriage and forks or the container handler.8. When the hydraulic system can be operated, removethe air from the parking brake. Use the special fitting onthe parking brake caliper to remove the air.WARNINGCompletely remove the air pressure from the tiresbefore removing the wheels from the lift truck. Airpressure in the tires can cause the tire and rim partsto explode causing serious injury or death.Always wear safety glasses.7. Remove the drive wheels from the axle:a. Raise the drive wheels to remove the weight fromthe tires, but so the tires are still touching thefloor. Loosen the wheel nuts just enough so theycan be easily removed. Remove the air from thetires. Remove the valve core to make sure all ofthe air is out of the inner tube. Push a wirethrough the valve stem to make sure that the valvestem does not have a restriction.b. Raise the axle so the tires and wheels can be re-moved. Remove the wheel nuts. Use a tire jack toremove the tires and wheels.WARNINGCheck all wheel nuts after 2 to 5 hours of operationwhen new trucks are put into operation or whenwheels have been removed and installed. Tighten the3nuts in a cross pattern to the correct torque valueshown in the MAINTENANCE SCHEDULE table.When the nuts stay tight for eight hours, the intervalfor checking the torque can be extended to 150hours.112354667891011202119181.2.3.4.5.6.7.8.9.10.11.171614WHEEL RIM (REFERENCE)HOUSING, DRIVE AXLEHOUSING, SERVICE BRAKESPINDLEOIL SEALWHEEL BEARING (2)LOCK PLATEWHEEL HUBSUN GEARPLANETARY GEAR AND SPIDER ASSEMBLYTHRUST BUTTON, SUN GEAR12.13.14.15.16.17.18.19.20.21.ADJUSTMENT NUTRING GEARRING GEAR HUBDUAL OIL SEALBRAKE DISCSINLET, COOLING OILBRAKE PISTONDUAL OIL SEALOUTLET, COOLING OILAXLE15131212963FIGURE 4. PLANETARY DRIVE AND BRAKE ASSEMBLY4PLANETARY GEAR AND SERVICEBRAKEDisassembly (See FIGURE 5.)1. SNAP RING2. SUN GEAR3. THRUST WASHER213STEP 1.Drain the oil from the planetary gearhousing. remove the 30 capscrews andremove the planetary spider assembly.Disassemble the planetary gear andspider assembly only if repairs arenecessary.STEP 3.Remove snap ring and remove the sungear from the axle. Remove the thrustwasher for the sun gear from the axle.1. LOCK PLATE2. ADJUSTMENT NUTCAUTIONDo not damage the seal surfaces between theplanetary spider and the wheel hub.The planetary spider assembly is heavy. Use asling and lifting device to move the planetaryspider assembly from the wheel hub.1212964WARNINGDo not remove the adjustment nut from thespindle until the wheel hub has a support. Thewheel hub and planetary gear components areheavy and can cause injury and damage if theyfall.STEP 2.Pull the ring gear from the wheel hub.NOTE:The sun gear is held to the axle shaft with asnap ring. Disassemble the axle assembly only if re-pairs are necessary.STEP 4.Remove the two screws that fasten thelock plate to the ring gear hub. Removethe lock plate and the adjustment nutfrom the spindle.FIGURE 5. DISASSEMBLY OF THE PLANETARY AXLE (1 of 3)5

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